I had to pick up an internal filter for my transmission today, and when I was at the Allison place, I saw these filter heads there. They have a built in hand pump for priming and a bleed screw. They can be had with filter elements ranging from 45 to 120 GPH and 30 to 2 micron filter rating. They also have heated fuel bowls and WIF sensor kits available. Anyone have any experience with them or looked into them?